Move ir box test under "box/ir"

compiler/testData/codegen/box/ir/primitiveNumberComparisons/doubleEqeq.kt

@@ -0,0 +1,17 @@
+fun eqeq(x: Any, y: Any) =
+        x is Double && y is Double && x == y
+
+fun anyEqeq(x: Any, y: Any) =
+        x == y
+
+fun box(): String {
+    val Z = 0.0
+    val NZ = -0.0
+
+    if (!(Z == NZ)) return "Fail 1"
+    if (!eqeq(Z, NZ)) return "Fail 2"
+
+    if (anyEqeq(Z, NZ)) return "Fail A"
+
+    return "OK"
+}